Posted on March 07, 2018 at 19:08 Hi
ELMHIRI.Syrine
,
I have looked at the example but I don't really get deep understanding about disable and enable write protection. Disable and enable are almost the same code and I don't know how the specific region is disable, or at least check the if that region is write protected or not to disable or enable. Below is a part of the code from the example which I don't understand.
HAL_FLASHEx_OBGetConfig(&OptionsBytesStruct);
HAL_FLASHEx_OBGetConfig(&OptionsBytesStruct2);
#ifdef WRITE_PROTECTION_DISABLE
/* Check if desired pages are already write protected ***********************/
if ((OptionsBytesStruct.WRPStartOffset == StartPage) && (OptionsBytesStruct.WRPEndOffset == EndPage))
{
/* Current area correspond to the area to disable */
OptionsBytesStruct.OptionType = OPTIONBYTE_WRP; //does this line of code disable the region?
OptionsBytesStruct.WRPStartOffset = 0xFF;
OptionsBytesStruct.WRPEndOffset = 0;
}
else if ((OptionsBytesStruct.WRPStartOffset == StartPage) && (OptionsBytesStruct.WRPEndOffset > EndPage))
{
/* Current area is bigger than the area to disable : */
/* - End of area is bigger than the last page to un-protect */
OptionsBytesStruct.OptionType = OPTIONBYTE_WRP;
OptionsBytesStruct.WRPStartOffset = EndPage + 1; //why is it only added by 1?
}
if you can give me a brief explanation for the code above I will highly appropriate. Thank you
